The overpopulation in the chawls and slums of Bombay is very clearly to be seen. But it still is better as in a city like Calcutta where the population even poorer is. For most people there are very many wishes to be fulfilled. Hygienically problems can't somehow not be avoided.
The last years the situation of the environment became even worse because of increase of traffic and airpollution. In the factories there is no filtering of the air that you breathe, so diseases concerning the lungs are increasing daily. Also the watersupply is badly, only a couple hours a day you can tap water in your house. You have to be fast with filling a bucket and when half of the population has done so there is no water anymore for that day.
Medical services are low and only the young people are entitled to medical care, old-timers make no chance. Hospitals are crowded and there are almost no medications available. The sad side to this story is that most of the medications are manufactured in India. Good functioning hospitals are therefor out of order.